Engraving or carving machine.



No. 794,792. PATBNTED JULY 29, 199s.

Y H. M. ALBEE.

BNGRAVING 0R GARVING MACHINE.

APPLIOATION FILED DB0. 5. 1999. No MODEL. 14 SHEETS-SHEET 1.

i- /1/ g .f

7 6 a ul +1 Le UM V fs ff WITNESSES: INVENTR` YH: mams viren; co,muro-umn.. wmumcw. n, l.

PATBNTED JULY 28, 1903.

` H. M. ALBEE. ENGRAVING 0R GARY/'ING MACHINE.

APPLICATION FILED DBO. 5, 1899.

14 SHEETS-SHEET 2.

' N'o MODEL.

INVENTUM wnTNEssEs: l

ATTORNEYS mk Nonms paens co., PHoTaUTHuIwAsmNsToN. n. c.

No. 734,792.A PATEN'I'ED JULY 28, 1903.

` H. M. ALBEE.

ENGRAVING` 0R CARVING MACHINE.

APPLICATION FILED DEC. 5, 1899.

N0 MODEL. 14 SHEETS-SHEET 8.

lil "Q ou Y Umlll---lllllh u wnNEssEs: INVENTUM 55%# /M mnfmwnwm.me

@M4 .Moa/.m

No. 734,792. l PATBNTED JULY z8, 190s..

v H. M. ALBBE. ENGRAVING 0R G ARVING MACHINE.

APPLICATION FILED DEG. 5, 1399.

NO MODEL. 14 SHEETS-SHEET 4.

fz a,

ATTORNEYS.

'Tres Nonms Panis co, Puma-umn. wAsmnoms. o r

No. 734,792. PATENTED JULY 28, 1903.

H. M. ALBEE. ENGRAVING 0R CARVING MACHINE.

APPLIOATION FILED DEO. 5, 1899. N0 MODEL.

I wlTNEssEsf Wa /40m- Muna-@mw y 377% www l BY ATTORNEYS 14 SHEETS-SHEET5.

PATENTED JULY 28, 1903.

` H. M. ALBER.

ENGRAVING 0R GARVING MACHINE.

` APPLICATION FILED DEG. 5, 1899.

14 SHEETS-SHEET B.

N0 MODEL.

INVENTOR.

N .WW 1,5.: Qd\

w s. a.

JIT/Miam WITNESSES: I. M,

NPC

ATTORNEYS No. 734,792. PATBNTED JULY 2a, 190s.

` H. M. ALBBB. ENGRAVING 0R CARVING MACHINE.

APPLICATION FILED DEG. 5, 1899.

NO MODEL. 14 SHEETS-SHEET 7.

WITNEssEs: INVENTUM 5(74/2 /W- jdo/mamw,

BY m

TH: Nnnnxs Psfsns co, wnoouwc.. WASHINGTON, D. c,

No. 734,792. PATENTBD JULY 28, 190s.. M. ARBRE.

EGrRMIlw` 0R GAR'VING MACHINE. APPLIUATION FILED: DBO. 5, 1899. No MODEL14 SHEETS-SHEET s.

iwnNEssEs; INVENTOR @24d/Z @M jwfmaawsn-MQJ'I/.w/a'w,

` ORNEYS.

THE :mums PETsR co, Provoumu., wAsnmcfwNy n. r

No. 734,792. PATBNTED JULY 28, 1903. H. M. ALBEE.

ENGRAVING 0R GARVING MACHINE.

APPLICATION FILED DEO. 5, 1899.

N.0 MODEL. 14 SHEETS-SHEET 9.

WITNESSESI INVENTORQ ma M www 4` ATTORNEYS PATENTED JULY 28, 1903.

H. M. ALBBE.

BNGRAVING 0R GARVING MACHINE.

APPLIDATION FILED DEO. 5. 1899.

14 SHEETS-SHEET 10.

N0 MODEL.

WITNESSES: INVENTORQ Wd@ ,M0/Mmm f .J7/,mamy

ATTORNEYS` Noms mms co., Fumo-nwo.. wAsnmuTou.

No. 734,792. PATENTED JULY 28, 1903.A

APPLICATION FILED DEO. 5, 1899.

N0 MODEL.

WITNESSES: INVENTOL` ATTORNEYS,

No. 734,792. PATENTED JULY 28, 190s.

H. M. ALBBE.

BNGRAVING 0R GAMING MACHINE.

APPLIUATIUN FILED DEG. 5, 1899.

V N0 MODEL. 14 SHEETS-SHEET 12:

...film

rn: cams arms co. pHoro-urne.. wAsmNG-rou. D. c`

"0.. `Il@ O PA'I'ENTED` JULY 28, 1903.

H. M.ALBBE.

ENGRAVING 0R CARVING MACHINE.

APPLIGATION FILED DBO. 5', 1899.

14 SHEETS-SHEET 13.

f-flllllllnm INVENTOR ,Momatm Jmmm,

WITN ESSES:

TToRN'EYs.

TH: NURRR Pinzas cu, Punto-uma., wAsmNm'oN, o4 l.

14 SHEETS-SHEET 144.

lNvENToR Hamann/.s MM/,wAmz-,-

ATTORNEYS 'PATENTED JULY 28, 1903.

H. M. ALBEE. BNGRAVNG 0R CARVING MACHINE. APPLIGATION FILED Do 5. 1999mr Norms Farms oo, momuws. WASHINGTON. l:v c.

N0 MODEL:

WITNESSES:

M mw.

UNITED `r STATES rtentea .my 2, 190s.

PATENT FFICE..

HONESTUS M. ALBEE, OF NEWARK, NEW JERSEY, ASSIGNOR OF TWO-THIRDS 'TOWILLIAM H. KING, OF NEWARK, NEW JERSEY, AND FRANK H. LA

PIERRE, OF EAST ORANGE, NEW` JERSEY.`

`lanen/wlNeon eARviNe MACHIN.

SPECIFICATION forming' partici' Letters Patent O. 734,792, dated July2S, 1903. Application illedDecember 5. 1899- Serial No. 739,242. (Nomodei.)

To all whom it `may 0071/097111,.- 1

Be it known that I, HONESTUS M. ALBEE, a citizen of the UnitedStates,1residing at Newark, in the county of Essex` and State of NewJersey, have invented certain new and useful Improvements in Engravingor Carving Machines; and I `do hereby declare the following to be afull, clear, and'exact descrip tion of the invention, such as Willenableothers skilled in the art to which it appertains totrnake and use thesame, reference being had to the accompanying drawings, and tocharacters of reference marked thereon,whieh form a part of thisspecification.

The generalobjects of this invention are to facilitate the work andreduce the cost of carving metal, and more particularly steel, in theart of die-sinking or other useful arts; to secure a more perfectreproduction of a given model, both in proportions and execution ofdetails; to reduce the labor and attention or supervision requiredwhile`.the machine is in operation,and thus render the inachine moreperfectly automatic; to reduce the pressure of the tracing-point uponthe model while carving, and thereby to preserve the surface of saidmodel from injury, especially should it be made of sott or otherwiseperishable material, and `more particularly to enable electrotypesto beemployed as models in the automatic carving of steel dies, and to secureother general objects and results,

. some of which may be hereinafter referred to.

So me of the specific objects and advantages will be described inconnection with the description of the working parts.

The invention consists in the improved engraving or carving machine andin the ar-` rangements and combinations of parts of the r same, allsubstantially as will be hereinafter set forth and finally einbraced'inthe clauses ments of the tracer governing the vertical movements of theengraving or carving tool,

`so that as the tracer rises and falls as it traverses the elevationsand depressions of the pattern the carving-tool correspondingly risesand falls to reproduce the design, the parts being relatively adjustableto enable the reproduction to be enlarged or reduced from the originalpattern and the pattern and work being movable together on suitabletables or supports adapted to reciprocate both laterally andlongitudinally of the Inachine, the horizontal movements of the worktable or support being increased or diminished inthe pattern, table, orsupport in correspondeuee with the variations of vertical movement ofthecarving-tool and tracer, and, furthermore, the tracer being given an ezeceedingly quick vertical Areciprocation by electrical means, wherebythesaid tracer al Vternately makes and breaks contact with the patternwith such exceeding rapidity as to virtually causea smooth and evenmovement over the irregular surface of the pattern as the latter moveshorizontally with its table or support. These even movements areaccomplished at various elevations, so that the tracer moves with thesame smoothness and quality of action over the high projections of t-hepattern as over the low surfaces.

Specifically the invention embracesnu merons detail improvements toenable the work to be performed with practical results of greatperfection and the prod uetion in steel to have the peculiar artisticmerit of the original.

Referring to the accompanying drawings, in which like characters ofreference indicate corresponding parts in each of the several figures,Figure l is a front elevation ot` the improved device. Fig. 2 is a rearelevation, and Fig. 3 is a side elevation, of the same. Fig. 4 -is asection taken through line :r of Fig. 3. Fig. 4i is a detail sectiontaken through the screw-shaft bearing of the workcarrierslide. Fig. 5isa section taken through lie y of Fig. 3. Fig. 6 is a front elevationshowing a portion of the bed-frame, a lever fulcrumed thereon, andcertain tool-carriers in connection with said lever. Fig. 7 isasectionon line z, and Fig. 8 is a section on line w' of Fig. 6. Fig. 9 isa-detail front elevation, and Fig. 10 is a detail plan,.of the leverbefore referred to. Figs. ll and 12 are respectively a front elevationand a. plan of an i attachment sometimes employed in connection vwiththe said lever and tool-carriers. Figs. 13 and 14 are respectively aplan and side elevation of a certain shaft-bearing block adapted tooperate in connection with said attachment; and Figs. 15 and 16 arefront and side views, respectively, of a coperating sliding block. Fig.17 is a section taken at line x2 of Fig. 1. Fig. 18 is a detail plan ofthe parts shown in Fig. 17. Fig. 19 is an enlarged sectional detailtaken through line :1:3 of Fig. 4. Fig. 19L is a longitudinal section ofa portion of a sectional shaft hereinafter referred to, and Fig. 2O is asectional view taken through line m4 of said Fig. 4. Fig. 21 is asection taken' through line m5 of Fig. 20. Fig. 22 is an enlarged detailView of a portion of the model or pattern holder. Figs. 23 'and 24 areArespectively detail front and side views of a certain arm thereof. Fig.25 is a sectional detail showing the parts last referred to from thefront, the front and rear and one side of the frame being removed; andFigs. 26 and 27 are front and side views of a certain stop-arm of saidparts. Figs. 28 and 29 illustrate in side elevation and plan certaindriving mechanism in detail, and Fig. 30 shows in detail anelectromagnetic attachment for governing the movements of a tracer ofthe improved machine; and Fig. 31 is a section taken at line y of Fig.30, showing more clearly the relation of the solenoid to thetracer-shaft. Fig. 32 is a diagrammatic View of a preferred arrangementof electrical appliances for governing the movements of the tracer.

In said drawings, c indicates a bed or frame of heavy and substantialcast metal suitably constructed to provide bearings for the workingparts. About midway of its vertical extension the said frame a provides,near its front and near its rear ends, parallel horizontal slideways bb, Figs. 2 and 4, on which are arranged a pair ot' parallel slides c c',the upper faces of each of which last provide slideways d d', extendingat right angles to the first said slideways of the bed or frame. On theslideways d d' are arranged sliding carriers e and f, adapted toreceive, respectively, the work to be operated upon and the model to bereproduced.

The slides c c' at their opposite ends are each provided with threadednuts g, Figs. 19, 20, fastened to said slides c c in any suitable mannerand adapted to receive pairs 7i rof screw-shaft sections, the firstbeing at the front and the second at the rear of the machine, disposedadjacent to the slidevvays b b, preferably near the outer sides thereofand parallel therewith, said pairs hi being arranged in bearings orboxes j of the bed or frame a, and adapted to rotate therein to effectasliding movement of the slides c c' on the slideways b. The saidsectional pairs h t are each provided with sprocket-Wheels 7c,

each section having its sprocket-wheel and the sprocket-wheel of oneshaft-section being of the same size as the connecting sprocketwheel ofthe corresponding section in the opposite pair, so that the connectedsections of the said opposite sections move simultaneously and at thesame rate of speed. The sections h3 h4 of each of the said pairs rotateindependent one of the other, the meeting end h', Fig. 19, of one of thesaid sections fitting into a socket h2, formed in the engaging section.The said sections h3 h4 are preferably provided with differently-sizedscrewthreads, those of one section being, preferably, one-half or otherproportion of the size of the threads of the other section, and theconnected sections of the opposite pairs having their threads of uniformsize. The sprocket-wheels 7a of the front pair h are connected to thesprocket-Wheels of the rear pair 'L' by chains l m, said chains being inconnection with sprocket-Wheels k' of a rear drivingshaft n. The saidchains im alsointermesh with adjustable idlepulleys p, having bearingson sliding studs q", arranged in slide- Ways 192 on the bed plate orfratrie.

The rear driving-shaft n is provided with two loose'beveled gear-Wheelsq q, Figs. 2 and 5, arranged on opposite sides of a peripherally-groovedsliding collar q2, also arranged upon said shaft, the said slidingcollar being provided at its opposite sides or ends with clutch-teethqs, adapted to engage coperating corresponding clutch-teeth on thecontiguous faces of the loose beveled gear-wheels q q. The said beveledgear-wheels 'q are operated continuously in opposite directions by anintermediate beveled gear-wheel r, arranged on a shaft s, having betweenits opposite ends a wormwheel t, which intermeshes with a correspondingWorin-wheel u on the power-shaft o, adapted to receive its power fromany suitable source by means of a pulley tu or any otherpower-transmitting devices. By shifting the clutch-collar q2 from onebeveled gear-wheel q to the other it is evident that the driving-shaft nwill be reversed in direction of movement, as will be ICO los

IIO

understood, the said clutch-collar being prevented from turningindependent of said shaft by an ordinary spline 'g3 or other suitablemeans. Atrain of clutch-shifting levers is provided, by means of whichthe rear clutch-collar q2 is operated from the front of the machine andthe rear driving-shaft n thus changed in direction of movement. The saidtrain of clutch-operating levers are Yprovided with-suitable means bywhich the rear clutch is operated automatically to secu re the desiredreverse movements. The specific construction of the said levers andautomatic shifting ydevices Aare hereinafter more fully described.

At the front of the machine is a second driving-shaft 2, Figs. 1' and'5, having loose beveled gear-wheels 3 and 4, similar to those aboverectons by a beveled pinion 6 on the shaft s, receiving its power fromthe power-shaft o through worm-wheels t u, before referred to.

The shaft 2, between the gear-Wheels 3 and 4, is provided with theclutching-sleeve 5, and

this is operated by a shifting-lever 50, fulcrumed at 51, Fig. 28, uponthe door or bed- `frame in any suitable manner.

\ The driving-shaft 2 is provided with a pulley7, by means of whichpower is transmitted therefrom through a belt 8 and pulley 9 `chanicalmotive power.

` to effect a movement of the Work-carier e on the slide c horizontallytoward the front or rear of the machine. The said pulley 9 is arrangedon a screw-shaft 10, extending from front to rear of the machine,arranged to rotate in bearings of the slide c,and the beltpulley 7 onthe shaft is of considerable axial length, so that the driving-belt 8may shift laterally on said pulley as the cooperating belt-pulley 9 onthe screw-shaft 10 travels `with the said screw-shaft with the slideway`c toward one side of the machine or the other.

` I may provide the screw-shaft 10 with a handwheel l1, by means ofwhich the said shafts l may be turned by hand While adjusting the die orits model prior to applyingr the mecarrier e` is provided with athreaded nut or bearing 12, Fig. 4a, through which the shaft 10 passes,and on turning axially causes a movement of the carrier on its slideway.

`The carrier e` is` provided with Vsuitable "means to receive and holdthe die Aor other l ting operations.

metal work undergoing the carving or cut- 'lhe model-carrierf is alsoprovided with suitable means to receive and holdthemodel irmlyinposition. The holding means may be ordinary setscrews 13 or any otherappropriate devices.

`Power and motion are transmitted from the i die-,carrier screw-shaft l0to the model-carrier screw-shaft 14 by means of interchangeablesprocket-wheels 15 16 17 18 (shown in Fig. 2 with clearness) and aconnecting-chain 19, arranged at therear end of the machine, where thesaid screw-shafts 10 14 each project rearward from the slides c c andare prol .upon the idle-pulley shafts16l 181, and thus as the slides c cand their screw-shafts move on their slideways the said arms are wherethey connect with the said screw-shafts either p spread apart or movedtoward one another.

The idle sprocket-pulleys and the sprocketwheels ofthe screw-shafts areconnected by the endless chain 19, so that the power is transmitted fromone screw-shaft to the sec- The sliding workond, and yet there is nointerference with the movement of theslides upon their slide- Ways.

To enable the sprocket-wheels to be changed for others of larger orsmaller diameter, I prefer to make opposite arms of the parallelograminthreaded sections,connectedby turnbuckles 22, so that the oppositesections may lbe increased in length to take up any slack or loosenessof the chain that way be caused by a reduction in the size of thesprocket- Wheels employed. The said arms 20 20 2l 21 are held on saidprojecting ends of the screwshafts, together with the sprocket-Wheels,by

suitable nuts 23 or in any other appropriate l manner.

By the construction of parts thus described it will be evident thatIcan` secure a movement of the model and die in two opposite directions,both lengthwise of the machine or toward or from the front or rearthereof and laterally or toward either of the sides thereof, and thesemovements both laterally and longitudinally may be differential, andthus I may make the model move at a speed higher than the die or work,and, furthermore, by the construction described and by having suitablesizes of screws and sprockets I may secure a cutting or carving actionboth in the forward and return movements of the carving-cutter, so thatthere will be no loss of time in the operations of the machine due toineffective return movements. The power thus transmitted from the shaft10 to the shaft 14 is effective in turning said shaft 14 in its axialbearings of the slide C', and inasmuch as the model-carrier f isprovided with a nut or threaded bearing on or secured thereto saidmodel-carrier is caused'to slide on the slideway at the'top of saidslide, the speed heinggoverned bythe size of the thread and of thesprocket-Wheels. Iprefer to form. the threads of the screw-shaft 10ofthe workcarrier smaller than the threads on the shaft 14 for themodel-carrier, the several parts being proportioned to obtain a rate ofspeed about one-half in the work-carrierof the speed of themodel-carrier, although this proportion may be changed by changing thesizes of the threads and of the sprocket-wheels 15 17, as Will beapparent.

The parts last above described relate to the front and rear movements ofthe model and work. I also obtain corresponding differential movementsof the model and work'latcrally by means of the differently-sizedthreads on the engaging sections of the sectional shafts h e', operatedby the sprocket-wheels 7o 7c, as before referred to. As said sectionalshafts rotate under the power of the sprocketthe other reciprocally, sothat the carvingtool and tracer employed in connection with the work andpattern, respectively, are caused to traverse the surfaces of said workand pattern, and in connection with the other mechanisms governing thevertical movements to reproduce in the work the outlines andconfigurations of the pattern, and because of the dierential movementsthe work performed differs in scale from the pattern, being increased ordiminished as may be required.

I prefer to govern the traversing movements of the carving-tool, tracer,and carriers automatically, so that when the tracer and tool have passedover the surfaces of the pattern and work in one direction returnmovements will be immediately effected automatically. ATo automaticallyreverse the direction of movement of the carrier e laterally in theslideways b, I have arranged at the rear of the machine alongitudinally-movable shaft or rod 25. (Shown clearly in the rearelevation of Fig. 2.) This shaft or rod at one end is in pivotalconection with a lever 27, fulcrumed at 28 on the said bed frame. Saidlever 27 is in turn connected at 29 With a rod 30, pivotally connectedwith a shiftinglever 31, adapted to engage the clutch-collar q2 andthrow it into clutching relation with one or the other beveledgear-Wheels q.

The shaft` or rod 25 is provided with arms or projections 32, adapted toextend into the path ofone of the slides c c', the said arms 32 beingadjustable on said rod 25, and thus said arms 32 may be so placed asthat when the carriers have carried the work or the pattern in onedirection beyond the limits of effective operation one of said carrierswillengage one or the other of said arms 32 and effect a longitudinalmovement of the shaft 25 and a corresponding shifting of theclutchcollar and reverse movements of therear sectional screw-shaft, thefront sectional screwshaft being reversed at the same time because ofthe chain and sprocket-Wheel connections before described. i

A lever 33, which is fulcrumed at one side of the frame, as at 34, Fig.3, is, in connection with a hand-lever 3 5, fulcrumed at 36 at the frontof the machine, so that the attendant of the machine standing at thefront may shift the parts last described at will.

To automatically reverse the front and rear movements of the carrier, Iarrange at one gaged by said carrier in either the forward or rearwardmovement of said carrier, the secondary slide Will be movedlongitudinally in its slideway. Said seco'ndary'slide is also providedwith a downward extension 40, the lower extremity of which isbifurcated, and the prongs 4l of said downward extension lie on oppositesides of a lever 42, lying horizontally beneath the slide c and having arock-shaft 43 lying in suitable bearings in the bed-frame. On the outersidc of said bed-frame said rock-shaft receives the arm 44 of the lever42, said arm extending downward into connection with a connectingrod 45,by which last said lever is connected to a bell-crank lever46. Saidbell-crank lever is in turn connected by a short rod 47 to the shiftinglever 50, having an arm 48, by which the clutch sleeve or collar 5 isoperated to effect a clutching engagement with one or other of thebeveled gear-wheels 3 and 4. The upper arm 5l of the lever 42 extendstransversely a distance about equal to the distance of movement of theslide c' on the slideways b, and thus the bifurcated extension 40remains in engagement with said eX- tension notwithstanding the lateralmovements of the slide and its carrier.

' Above the carriers for the die and pattern the bed-frame a is providedat the sides with vertical slideways 55, Fig. 17, on which is arranged ahorizontal slide 56, the opposite ends of said slide 56 being suitablyformed to engage said slideways and permit vertical adjustment thereinand when adjusted maintain great firmness and rigidity when the machineis in operation. When adjusted, the said slide 56 is held in rigidoperative position by means of end set-screws 54 54 and screw-shafts 5757, working in threaded nuts 58, fastened to or arranged beneath theopposite ends of the slide, the said shafts 57 57 and the slide 56 beingsupported by a crossbar 59 of the frame having bearings for the saidshafts. Above the said cross-bar 59 the shafts 57 are bprovided withbeveled gearwheels 60 60, which engage correspondinglybeveledgear-wheels 6l 6l upon a horizontal crank-shaft 62, the gear-Wheels 606l at the opposite ends of the cross-bar being of uniform size and thevertical shafts being uniformly threaded, so that when the crankshaft isturned in the bearings of the bedframe by means of the handle or crank62 the said slide 56 Will be raised or lowered in its Vvertical bearingsuniformly at opposite ends. Upon the said horizontal slide 56 arearranged two horizontally-adjustable toolcarriers 63 64, one of whichprovides bearings for the tracer-shaft 65, guiding the same and holdingit steady in its independent vertical movements, and the other of whichprovides bearings for the carving-tool shaft 66 and supports said shaft,raising said shaft when said carrier is raised and falling by gravitywith said carving-tool shaft. The said carriers may be horizontallyadjustable on the slide 56 by means of the hand of the operator or bymechanical means. Suitable clamping or setting means or set-screws 67are provided IOO IIO

for rigidly holding said carriers into position after they havebeenproperly adjusted. The carriers 63 64 are preferably made in sections,the sections68 68 in contact with the horizontal slide 56 being providedwith vertical slidet Ways on which the second or forward sections forfastening the said parts rigidly together.

`The forward sections 681 are centrally apertured between their upperand lower ends `to provide passages for a horizontal lever 70,

and above and below the horizontal apertures or passages the saidforward sections are provided with. boxes or bearings for the shafts 6566. The carving or die-sinking Atool shaft 66 in its carrier-section 681is held `in said carrier-section by the pulley 73,

fastened on the upper end ot' said shaft. The tracer-shaft 65 is heldbythe lever 70, fulcrumed at one side ofthetnachine,as at 74,andconnected by a rod 77 at the opposite end to a hand-lever 75, fulcrumedat 76 upon the bedframe. The said lever 70 being fulcru'med upon oneside of the machine and extending transversely across the said frame andhaving the two shafts disposed thereon at different distances frotn thefulcrum, it is evident that the tool and tracer operated by said leverwill have different degrees of vertical movements. When the tracer andits shaft 65 is nearer to the fulcrum 74 than the carvingtool 66, thevertical movements of the tracer will be less thanthe movement of thecarvingtool, and thus I secure a greater relief projection of thearticle reproduced from the pattern. I prefer in ordinary practice,however, `to arrange the carving or die-sinking or cutting tool shaft 66and its carrier or support nearer to the fulcrum than the tracershaft65, so that ordinarily the reproduction will be of a smaller size thanthe pattern.

To increase or reduce the size of the reproductionto the desired extentand with convenience, I prefer to make the fulcrunt 74 of the lever 70adjustable, and to this end I arrange upon one side of the bed-frame a.

bracket78, upon or in which is formed a horit zontal slidcway 79 toreceive the fulcrumbolt 74, thehead 741 of which last is arranged insaid slideway 79, as indicated in Fig. 8,. The lever adjacent tosaid'slideway is longitudinally slotted, and in theslot 80 of said leveris arranged a sliding bearing-block 81, which is perforated to receivethe fulcrnmbolt 74 and a collar 82. Said collar 82 is a xed intoposition, but the block 81 is permitted to freely turn pivotally withthelever.

The carving-tool shaft 66, ordinarily arranged next in order to thefulcrum 74, is connected to the carving-tool-shaft carrier, or at leastthe front section thereof, as already described,

and said carrier is connected to the lever 70, so as to move verticallytherewith, the connection being preferably a bolt 841, Fig. 7, whichextends through a block 86, adapted to slide in the saine slot 8O asthat in which the fulcrum-block 81 is arranged, the said block 86 beingheld in position by a washer 87 and the head of said bolt 841 preventedfrom being clamped by a collar 89. Thus when the said lever 70 is raisedat its free end `by the hand-lever 75 or the means hereinafter describedthe forward section 681 of the carving-tool carrier will also be raised,sliding on the rear section. To render the sliding move- `me-ntsmoreeasy, I have provided a counterbalance-Weight 89, arranged ona segmentallever 90, connected to the movable carrier by means of a strap 92 orother suitable connection.

Above and below the lever connection within the recess of thecarving-tool carrier the said carrier is provided with boxes or bearings88 for the carving-tool` shaft 66, and by `the pulley 73 on the upperend of said shaft of carving metal.

The tracer-shaft 65 is connected with the lever 70 by means ofclamping-jaws 96, at.- tached to the lever and adapted to grip the shaftwhen drawn together by means of a screw 97 or other suitable means, thesaid jaws 96, Figs. 9, l0, having a sufficient pivotal play upon thesaid lever to prevent the parts from jamming. The tracer-shaft 65 ismoved vertically in its bearings on its Acarrier 63 by the pattern andother means independent of its said carrier imparting its movement tothe lever 70, by which thentnvement is transmitted to thecarving-tool-shaft carrier and shaft.

To partly counterbalance the weight of the tracer-shaft and to secure avery sensitive movement of the tracer over the surfaces of the pattern,I have provided an electromagnet adapted to attract the shaft 65 andraise it from the pattern immediately upon an elec' tric contact of thetracer with said pattern `being made and itntnediately upon tht` raisingof the tracer from the pattern, so as to cause a break in the circuit,to become demagnetized and permitthe immediate dropping of the tracer bygravity again into con- IOO - together and close the circuit 101.

that the tracer in practice moves over the su rfaces of the pattern withgreat freedom, even though the latter has strong and abrupt projections.

The construction of the electromagnet and its relation to thetracer-shaft will be now more fully described. The magnet is of thattype commonly known as solenoid and is shown in detail in Figs. 30 and31. Said solenoid 100 is arranged at the upper end and around thetracer-shaft and is in electric connection with a dynamo-electricmachine,

(not shown,) with which the wires 101 are in circuit. On the circuit 101is acircuit changer or breaker 102, comprising an armature-lever 103,fulcrumed upon a suitable bed or support 104, as at 105, and having atits free end a terminal or contact point 106, adapted to engage aterminal or contact point 107 in connection with the circuit-wires 101.Contiguous to said armature-lever 101 is arranged on lthe bed or support104 a-n electromagnet 108 on a supplemental circuit 109, connecting withthe metallic surface of the pattern 110,

Figs. 30 and 31, and tracer 210 or the shaft 65 thereof. The battery orbatteries 111 on lthe supplemental circuit is of sufficient power tocontrol the operations of the circuit-breaker without danger of burningor otherwise injuring the tracer. The relation of the parts is such asthat when the tracing-tool touches the surface of the model thesupplemental circuit 109 is closed and the magnet 108 is magnetized, sothat it will attract the armaturelever 103, bringing the contact-points106 107 By this action the dynamo-electric machine or other `generatorin turn xnagnetizes the solenoid 100 and causes it to raise the shaft 65and its tracer 210 away from contact with the metal surface of thepattern, thus breaking the supplemental circuit by demagnetizing themagnet 108 and permitting the contact-points to separate. Thecircuit-breaker 102 is furnished with a spring 112, adapted to lift thearmature-lever 103 away from contact with the terminal 107 when thesupplemental circuit 109 is broken, and thus the main or dynamo circuit101 is broken, the solenoid is demagnetized, and the tracer-shaft 65permitted to drop by gravity. These actions are repeated alternatelywith great rapidity, and in practice the tracer serves to simply glideover the irregular surfaces of the pattern, and because of the quickrepeated liftings and gravitations the said tracer is not given a directhorizontal movement against the inclined surfaces of the pattern, whichwould tend to scratch and damage the pattern, especially if the samewere made of a soft pattern metal, an ordinary electrotype of depositedmetal, or the like. The pattern is supported on suitable insulation 113.

I may vary the construction of the electric appliances above describedto meet special conditions. Instead of a battery for the supplementalcircuit I may by the use of a suit- Again, I may employ any suitableswitch 116- to cut off the machine from the main source of electricalenergy.

In cases where I desire to reproduce a pattern without changing theproportions there- 'of I prefer to employ an attachment shown in Figs.6, 7, 11, 12, 13,14, 15,16, where 120 indicates a`longitudinally-slotted shaft or bar adapted to be fastened by bolts orother means to the carving-tool-shaft carrier 64,; as indicated in Fig.7so as to move vertically therewith or so that when said shaft or bar 120is elevated said carrier will move vertically therewith. Said shaft orbar 120 projects horizontally into the lever-passage of thetracer-carrier 63, where it is slotted longitudinally, as at 121, toform a slideway for a sliding block 122. This said sliding block iscentrally perforated to receive an arm 123 of a block 124, adapted to beset upon the shaft65 by the set-screw 125, as clearly shown in Fig. 7.By this construction the tracer-shaft is directly fastened to the workor carving-tool carrier and its shaft 66, so that both said shafts 65and 66 operate vertically at uniform speed. When the shaft or bar 120 isin connection as above described, the connection 96' of the shaft 65(shown in Figs. 9 and 10) with the lever 70 is removed, as will beunderstood.

While I have employed positive language in describing 'the machine inits various details of construction, I am very well aware that variousmodifications may be made in the construction of the device withoutdeparting from the spirit or scope of the invention, and therefore I donot wish to be understood as limiting myself bythe positive descriptiveterms employed, excepting as the state of the art may require.

Having thus described the invention, what I claim as new is- 1. Theimproved engraving or carving machine, in which is combined a bed-framehav- .ing means for supporting the work and pattern, an engraving-toolmovable to and from the Work, a tracer, a lever connecting theengraving-tool and tracer whereby the latter governs the to-and-fromovements of the engraving-tool,an electromagnetic device adapted tolift the tracer from the pattern to facilitate the passage of the saidtracer over the face of the pattern and a circuit for saidelectromagnetic device including a pattern, for energizing the deviceand drawing the tracer away from the pattern immediately upon thecontacting of the tracer and pattern, substantially as set forth.

2. The improved engraving or carving machine comprising a bed-frame, anengraving- ICO IIO

